Observing Fig.REF , one clearly notice that three system
phases-thermal radiation, a stable large black hole, and a
metastable large black hole-are persisting. The minimum
temperature \(T_{min}\)  and the Hawking-Page transition temperature \(T_{HP}\)  are
respectively illustrated by the solid and red dashed curves. There is no terminal point in both coexistence lines, and the phase transitions can happen at all pressures, without
a critical point [1]}. Therefore, it is more like solid/supercooled-liquid/liquid phase structure. The size of the region between the curves which represents metastable large black hole states, widens as the pressure increases. A similar behaviour in solid/liquid (thermal radiation/stable LBH) phase transitions is due to a delayed transformation from one phase to another caused by the system occupying more metastable supercooled-liquid (metastable LBH) states.
